期刊
CARBOHYDRATE POLYMERS
卷 209, 期 -, 页码 310-319出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.01.040
关键词
Nanocomposites; Cellulose nanofiber; Graphene oxide nanosheets; Gas barrier; Highly oriented
资金
- National Natural Science Foundation of China [51573147, 21706208, 51773167]
- Xianyang Science and Technology Research Project [2018k02-29]
Graphene oxide nanosheet/cellulose nanofiber (GONS/CNF) nanocomposite films with ultra-low gas permeable property were fabricated through layer-by-layer coating and hot pressing method. XRD results showed that GONS was completely exfoliated and well dispersed in CNF matrix. The images of SEM and GI-WAXS manifested that the exfoliated GONS was highly oriented along the film direction under a strong external shear flow field. Such unique structure endows GONS/CNF nanocomposites with ultrahigh oxygen barrier property and good water vapor barrier performance. With only 3.66 vol% GONS, the oxygen permeability coefficient of CNF film decreased by about 4 x 10(4) times, from 5.5 x 10(-13) to 1.4 x 10(-17) cm(3) cm.cm(-2) s(-1) Pa-1. Meanwhile, the tensile strength and Young's modulus of the CNF film were respectively enhanced by 2 and 57 times. Furthermore, the thermal stability of CNF film was also improved with the incorporation of GONS.
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